What is #"electron affinity"#?

1 Answer
Sep 17, 2017

Answer:

#M(g) + e^(-) rarr M^(-)(g) +Delta#

Explanation:

The electron affinity is the energy associated with the formation of one mole of gaseous anions, from one mole of gaseous atoms, and one mole of electrons.

Disbarring the Noble Gases, electron affinities generally INCREASE across a Period from left to right as we face the Table, and DECREASE down a Group.....and this is a function of nuclear charge, i.e. #Z#, #"the atomic number."#